US1308829A - Automatic mixing and antiscai - Google Patents

Description

H. L. YOUNG AND M. S. FINCH. AUTOMATIC MIXING AND ANTISCALDING VALVE.

' APPLICATION FILED FEB. 25.19I6. 1,308,829. PatenIed'July 8,1919.

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HARRY Ia. YOUNG lAN'D MAURICE S. FINCH, OF ST. JOSEPH, MISSOURI.

AUTOMATIC MIXING AND ANTISCALDING- VALVE.

Specification of Letters Patent.

' Patented July 8, 1919.

Application'led February 25, 1916. Serial No. 80,371.

To all 'whom t may concern.'

Be it known that we, HARRY L. YOUNG and MAURICE S. FrNoH, citizens of the .United States, residing at St. Joseph, in the county of Buchanan and State of Missouri,

have invented certain new and useful Improvements in Automatic Mixing and Antifscal ling Valves, of which the following is a specification, reference being had therein to the accompanying drawing.

Our invention relates' to improvement-s in that class of mixing valves, which are used for mixing cold water and steam or for mixing cold and hot water, in providing water, heated to various temperatures, for

. scrubbingV floors, bathing, and all other purposes, where heated water is used. The objects of our improvements are, first; to provide a valveof this class, by the use of which, cold water and the heating agent Y can be mixed in any desired proportions,

second: to provide automatic shut-off mechalnism for the heating agent, whereby the latterl is kept shut off, until cold water is {iowing, under pressure, through the valve, and whereby said heating agent is automatically shutoff, in an'instant, whenever said cold "water thus `ceases to flow, thereby preventing the burning of hose, leading from the valve, and the scalding of persons, on whom the water is flowing, third: to soform and a1"- -range the liquid conducting passages, that there shall be no backflow of liquid therejthrough, nor direct impact of the heating :agent against the cold water, and' vice versa, regardless of the initial pressures of the same, therebypreventing the `concussion and jar'in the valve, which" is commonly called f water hammer, fourth: to so constructthe valve, that the Coldwater and the heating agent are prevented from reaching each i other, until `=they reach themixing chamber.

I attain these objects by the mechanism illustrated in the accompanying drawing, inwhich Figure 1 is a longitudinal section, embodying the Vinvention cut on the line X, X,

i -seen in Fig. 2, looking toward the right.

Fig. 2'isa plan view of the valve. Fig. 3 is a transverse section of the valve piston, on the line Y Y, seen in Fig. 1, looking toward `the left. Figs. 4 and 5 are detail views of the valvesand their cams, looking toward the right, showing the same in two positions.

Fig. 6 is a similar view in detail showing oneof` the other various forms in which the cold water controlling cam may be made. Fig. 7 is a side view of the sleeve coupling certain parts being broken away.

Referring to Fig. 1, valve body 1 has water inlet connection 2, valve chamber 3, steam inlet connection 4, steam valve chamber 5, mixing chamber 6, and outlet connection 7, formed therewith, through the latter of which, the hereinafter described mixture of water and steam is discharged.

Valves 3 and 5 are actuated by springs 3 and 5, respectively, to close their respective valve openings. Said valves have stems 10 and 11 respectively, formed therewith.

Said stems are respectivel guided in the apertured stem guides 12 and 13.

Water valve 3 is raised by rotation of lcamv 14, which is formed with the inner ment limited by stops 20 and 20', which are formed on the outer surface of packing box 16, as seen in Fig. 2.

Valve piston 2,1, (see Fig. 1,) is slidably land rotatably'mounted in piston chamber 22,`and is actuated by spring 23, to close the upper end of water passage 24. Said piston has sleeve 21 formed therewith, which latter has stem 25 formed on the end thereof.' Cam 26 is -formed on the end of said stem, and is thereby carried into and from active position, with relation to valve stem 11. Said stem is slidably and rotatably mounted in an aperture formed through partition 26 whichis formed with body 1, betweenchamber 22 and steam cam chamber 26, which latter is formed in body 1.

Sleeve 21 has an annular countersink 27 formed therein, in which the annular end portion 15 of shaft 15 is slidably guided. The adjacent portion 15 of said shaft is of rectangular form, (see Figs. 3 and 7,) which latter portion is slidable in slot 21, which slot is formed in said sleeve. The shouldered portion 15a of shaft 15 limits the previously described, spring actuated lmovement of piston 21. A

.Said slotted sleeve and the rectangular portion of said shaft which is engaged there- Y with, form a slidable drive coupling, whereby said shaft rotates said sleeve and the therewith connected parts. Y

Chamber 26 and mixing chamber 6 are connected by steam kpassage 28, the transverse `area of which gradually increases in size, from chamber 26 to its outlet end, for purposes hereinafter described.

The central portion '24 `of water passage 24 is formed of reduced transverse :area for the same reasons. Y

l/Vater inlet .connection 2 is connected withl a source of water under pressure, by pipe 2, while steam inlet connection 4 is connected with a source 'of steam under pressure, by pipe 4.

Since said sources ofsteam and water may be of any well known kind, they and their connection are neither shown nor described.

Outlet connection 7 is adapted to have a hose nipple connected therewith, for :attaching hose thereto, or to have a pipe connected therewith, for conducting the heated water` from the described valve, to any -desired point. Y

In operation, with the partsin the position seen inFigs. 1, 2 and l4, the operator of the valve, manually rotates handle 19, clockwise, thereby rotating cams 14 and v26 from the positions seen in Fig. 4, to the positions seen in Figo.

During this movement, cam 14 moves stem 10 and the therewith lformed valve 3, opening said valve and admitting water (not shown,) from chamber 3 into ychamber 22.

The water thus admitted, moves piston21 from the position seen in Fig."1,overcoming vspring 23, :and opening passage 24. Said water then passes through :reduced `portion 24 of said passage, under full pressure, .and moves more slowly through the larger, 4lower end portion of said passage, `and thence into mixing chamber 6. The thus maintained full water pressure in portion 24 of passage 24, forms lresistance against back-.flow of steam therein, as hereinafter described, and also maintains a suficient amount of pressure of water in chamber 22, to hold piston` 21in its described position. Y

This vmovement of said piston and the therewith formed piston stem l25 :and-cam 26, carries said I'cam into active position, with relation to valve stem 11. it will be seen and'understood 'from the foregoing, that Icam 26 is held `from its active position, by pressureo-fspring 23 against @piston 21until said spring isoverco'me, fas. stated, and also that should supply of water fail from any cause, the resulting lack of hydraulic pressure against piston 21, would liberate said spring, the pressure of which would move vsaid piston from its described position, tothe Vposition seen in Fig. 1, thereby moving cam 26 from its described active position to the position shown. y This arrangement of devices at all times, renders said cam inactive and prevents the opening and the holding open thereby, of the steam inlet valve 5, (as hereinafter described,) except while water is in chamber 22 under pressure, and is passingV therethrough; which prevents burning of hose and scalding of persons, as ystated in the objects.

Continued rotation of handle 19, until Vstopped by stop 20', rotates cams 14 and 26, the latterV of which continues to hold stem 10 and the therewith formed valve 3 in their described raised position, while cam 26 raises steml 11 and the therewith formed valve 5, which admits steam from chamber 5,*into chamber 26, from-whence said steam passes into steam passage V28, under full l pressure. Said steam gradually expands to a lower pressure in passing through the gradually increased bore of said passage, until the larger end ofV said passage is reached, where lsaid steam `unites with the previously mentioned water, in mixing chamber 6.

It will be understood that said steam upon :thus uniting with said water, is thereby condensed and heats saidV water, land Vthat the conductors e at reduced pressures, `in streams, .inclinedV tow-ard each other, as directed by their :respective passages, causes said streams to uni-te, without causing `what is commonly .called water-hammer, whichV is frequently experienced in the use of valves of thisclass.

Reverse rotation of `handle 19, from stop 20 to stop 20, -liberates -val-ves'5 and3, in the -order named, upon `which their :respecftive springs 5 andf3, (assisted bythe pres-V sures Vof -said steam and iwaterg) VYclose said lvalves. n

While we have shown and described the `water controlling cam '14, in the foregoing manner, it is evident that said cam could be y Vjusting the heat of the water,

vrotating handle 19, seen in Fig. 1. Since all kfor allowing made in various forms, for controlling the serve the right to do.

One of such other forms of water controlling cams is shown in Fig. 6, in which cam 14 has the sloped face 14: formed thereon, stem 10 and the therewith formed Water controlling valve 3 to be vgradually closed, for gradually stopping the flow of Water therepast, which results in a hotter mixture in mixing chamber 6, seen in Fig. 6. This form of cam is desirable where i y the heating agent is hot Water instead of steam, and especially Where said heating agent has not been heated to a suiiciently high degree. It also provides means for adby adjustably of the unmentioned parts seen in Fig. 6, are the same 1n construction and operation as Y the previously described parts, said unmentioned parts are designated as previously pointed out, and further description of the same is deemed unnecessary.

Having fully described o ur invention, what we claim as new, and deslre to secure Vby Letters Patent, is

In a mixing and anti-scalding valve; a

y" valve body; a mixing chamber formed with .30. said mixing chamber; a piston chamber in said body; an outlet directly connected With said valve body; a water passage connecting said piston chamber ber; a piston valve slidably mounted in said piston chamber a spring for with said mixing chamand rotatably `copies of this patent may be obtained for said piston chamber, said valve being pro- Y vided with a stem therefor; a steam cam chamber connected with said mixing chamber; a steam inlet valve for admittin a heating agent into said steam cam cham er said valve having a stem therefor; a steam cam in said chamber said cam being formed with said piston valve and being thereby normally held out of active position with relation to the last mentioned valve stem; a handle on the extended end of said cam shaft whereby the same is rotated; and a caml on said shaft beneath the stem of said Water inlet valve, said cam being so timed in relation to said steam cam that said water inlet valve is fully opened before said steam cam becomes operative.

In testimony whereof we affix our signatures in the presence of two witnesses.

HARRY L. YOUNG.

MAURICE S. FINCI-I.

Witnesses:

ISAAC I-I. HOWARD, LENA P. BoxnLL.

tive cents each, by addressing the Commissioner of Patents, Washington, D. C.

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